iPhone text Messages app is really slow and laggy now with iOS 11. How can I fix this?

I have an iPhone SE.  I was on iOS 10.3.3 for a while and was avoiding iOS11 because I'm not too keen on updating to the latest version until I stop hearing the multitude of reports of issues on the latest version.

However, Apple tricked me when I thought I was dismissing/delaying their update and they updated my iPhone overnight.  This was a few weeks ago this happened.  And its just been incredibly frustrating using Messages since that happened.  I've tried restarting my iPhone, deleting a ton of older messages, but the app's performance is just atrocious.

When I am typing a message it lags to produce the word into the message.  When I press send its laggy in sending the message.  When I try to attach pictures there is a delay too.  The scrolling is not terrible, but noticeable lag is there.  I don't see this type of issue on other apps I use on the iPhone, so I believe I've narrowed it down to Messages app.

What can I do to get back to the great app performance I had when on iOS 10.3.3?

My iPhone does regular backups to iCloud.
LVL 19
Kyle SantosQuality AssuranceAsked:
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JohnBusiness Consultant (Owner)Commented:
I have an iPhone SE and text messaging is fine.

Apple has said the batteries on iPhone 6 and above (including SE) need to be replaced. The battery is being throttled back to prevent shutdown but performance suffers.

Take your phone to an Apple Store and ask to have the battery replaced. $29 US
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Kyle SantosQuality AssuranceAuthor Commented:
Thanks.  Seems drastic a solution for one app's performance being degraded while other apps are just fine for me.

Apple has said the batteries on iPhone 6 and above (including SE) need to be replaced. The battery is being throttled back to prevent shutdown but performance suffers.
That would be inline with this report.  http://appleinsider.com/articles/17/12/20/apple-responds-to-reports-of-worn-battery-forcing-iphone-cpu-slowdown

Someone shared this with me a few days ago and I finally got around to reading it.  http://bgr.com/2018/01/01/iphone-battery-replacement-29-how-to-iphone-slowdown-scandal/  
This conversation also provided help as well.
https://www.reddit.com/r/iphone/comments/7inu45/psa_iphone_slow_try_replacing_your_battery/

C'est la vie
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JohnBusiness Consultant (Owner)Commented:
I have heard the one app story so that is why I mentioned it.

You can also try a Network Reset. Settings , General, Reset, an Reset Network devices
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JohnBusiness Consultant (Owner)Commented:
Cheers and good luck. I am going to get my own battery replaced soon
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Kyle SantosQuality AssuranceAuthor Commented:
You can also try a Network Reset. Settings , General, Reset, an Reset Network devices
Forgot about that.  I'll try that out.  Thanks!
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Kyle SantosQuality AssuranceAuthor Commented:
This is probably a temporary solution, but it worked.  Thanks, John!!!
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JohnBusiness Consultant (Owner)Commented:
You are very welcome and again, happy to help.
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